Mainframe Network Engineer

Who We Are At Kyndryl, we design, build, manage and modernize the mission‑critical technology systems that the world depends on every day. So why work at Kyndryl? We are always moving forward – always pushing ourselves to go further in our efforts to build a more equitable, inclusive world for our employees, our customers and our communities. The Role The Mainframe Network Engineer is responsible for the design, configuration, implementation, and support of network connectivity for IBM mainframe environments. This role ensures reliable, secure, and high‑performing communication between mainframe systems, distributed platforms, external partners, and enterprise applications. The engineer will work on key technologies such as TCP/IP, VTAM, SNA, Enterprise Extender, TN3270, FTP, and network security controls, supporting critical production workloads in large enterprise environments. One of the benefits of Kyndryl is that we work with clients in a variety of industries, from banking to retail. Whether you want to broaden your knowledge base or narrow your scope and specialize in a specific sector, you can find your opportunity here. You’ll also get the chance to share your expertise by recommending modernization options, identifying new business opportunities, and cultivating relationships with other teams and stakeholders. Does the work get challenging at times? Yes! But you’ll collaborate with a diverse group of talented people and gain invaluable management and organizational skills, which will come in handy as you move forward in your career. Your future at Kyndryl Every position at Kyndryl offers a way forward to grow your career, from Junior System Administrator to Architect. We have opportunities for Cloud Hyperscalers that you won’t find anywhere else, including hands‑on experience, learning opportunities, and the chance to certify in all four major platforms. One of the benefits of Kyndryl is that we work with clients in a variety of industries, from banking to retail. Whether you want to broaden your knowledge base or narrow your scope and specialize in a specific sector, you can find your opportunity here. Kyndryl currently does not require employees to be fully vaccinated against COVID‑19, however, if you are hired to work at a client, customer, or partner location, you may be required to show proof of vaccination to align with their respective COVID‑19 vaccination policies. Those who believe they are eligible may apply for a medical or religious accommodation prior to the start of employment. Who You Are Install, configure, and maintain z/OS Communications Server components. Support and manage TCP/IP configuration on z/OS systems. Maintain and troubleshoot VTAM definitions and network resources. Configure and support Enterprise Extender (EE) and SNA connectivity where applicable. Maintain TN3270 access and session‑related connectivity for end users and applications. Ensure stable communication between mainframe systems and distributed servers, external vendors/partners, internal enterprise applications, middleware platforms. Diagnose and resolve connectivity issues involving IP routing, port communication, session failures, DNS resolution, firewall‑related blocks. Support file transfer protocols such as FTP, SFTP, and other secure data exchange solutions. Work closely with network security teams to enforce secure communication protocols. Ensure compliance with enterprise security controls and audit requirements. Support SSL/TLS certificate implementation and secure transmission standards. Assist with firewall rule validation, port usage reviews, and vulnerability remediation. Support network design and recovery procedures for disaster recovery (DR) environments. Validate communication paths for fail‑over systems and backup data centres. Participate in DR tests and business continuity exercises. Required Qualifications Minimum 5+ years of experience in mainframe networking or z/OS communications support. Familiarity with JCL, TSO/ISPF, SDSF. Ability to analyze logs, traces, and dump information relevant to communications issues. Solid knowledge and experience on TCP/IP on z/OS, VTAM, SNA / Enterprise Extender, TN3270, FTP / SFTP and TLS. Preferred Experience Experience in supporting transmission products such as Connect Direct. The ability to work independently as well as part of a team. Excellent troubleshooting and customer service skills. Participate in on‑call rotation with the engineering teams. The ability to follow a project through to completion, and/or to work as part of a larger team to complete the components of a complex project. IBM mainframe or networking certifications are a plus. Being You Diversity is a whole lot more than what we look like or where we come from, it’s how we think and who we are. We welcome people of all cultures, backgrounds, and experiences. But we’re not doing it single‑handily: Our Kyndryl Inclusion Networks are only one of many ways we create a workplace where all Kyndryls can find and provide support and advice. This dedication to welcoming everyone into our company means that Kyndryl gives you – and everyone next to you – the ability to bring your whole self to work, individually and collectively, and support the activation of our equitable culture. What You Can Expect With state‑of‑the‑art resources and Fortune 100 clients, every day is an opportunity to innovate, build new capabilities, new relationships, new processes, and new value. Kyndryl cares about your well‑being and prides itself on offering benefits that give you choice, reflect the diversity of our employees and support you and your family through the moments that matter – wherever you are in your life journey. Our employee learning programs give you access to the best learning in the industry to receive certifications, including Microsoft, Google, Amazon, Skillsoft, and many more. Through our company‑wide volunteering and giving platform, you can donate, start fundraisers, volunteer, and search over 2 million non‑profit organizations. At Kyndryl, we invest heavily in you, we want you to succeed so that together, we will all succeed. #J-18808-Ljbffr Kyndryl Inc.